I have the original bridgestone dueler hl tires on my car. I've put a lot of highway miles on my car. I bought it new in 9/2010 and got 52k out of them, even passed inspection with them 2 months ago. Drove over a curb last night, tire pressure light came on and the right front tire looked low. I then continued to drive approximately 30 miles at 35-40 mph till I got home. Did some research and decided to stay with the run flats. This is my first BMW and it just occurred to me that every other new car I have bought was delivered with terrible tires that lasted barely 15K miles. So I decided to put the exact same tires on the car. Picking it up later today. Spending 270 per tire.